Compare calculators

Both calculators run independently — change the inputs on either side to compare results.

Focal Length Calculator

Find the focal length of a lens given the distance to the object and the distance to the formed image. Essential for photographers, opticians, and physics students working with thin-lens optics.

Object Distance (cm)

Image Distance (cm)

Fill in the required fields to see your result.

Optics

Polarization Calculator

Calculate the intensity of light transmitted through a polarizer and analyzer using Malus's Law. Perfect for optics students and engineers designing polarized optical systems.

Initial Light Intensity (W/m²)

Polarizer Angle (degrees)

Analyzer Angle (degrees)

Initial Light Type

Fill in the required fields to see your result.

Key differences

	Focal Length Calculator	Polarization Calculator
Category	Optics	Optics
Inputs required	2	4
Result	Focal Length (cm)	Transmitted Intensity (W/m²)
What it does	Find the focal length of a lens given the distance to the object and the distance to the formed image. Essential for photographers, opticians, and physics students working with thin-lens optics.	Calculate the intensity of light transmitted through a polarizer and analyzer using Malus's Law. Perfect for optics students and engineers designing polarized optical systems.